If I were to get a raw with the 100 lumen emitter, what could I realistically expect for the runtime. I know it says 90 minutes, but what does that mean? Is that 90 minutes to a dead battery or around 100 lumens for 90 minutes till it starts to dim. I see some lights use x number of minutes to 50%, is that what this means? I may have to order the Raw Al or Ns because the new CR2 light doesn't appear to be forthcoming soon. I would like the camo version, but have not heard much about it lately.